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Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2
The NM_000264.5(PTCH1):c.-15_-4dupGGCGGCGGCGGC variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000338 in 147,736 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: 𝑓 0.000034 ( 0 hom., cov: 22)
Exomes 𝑓: 0.000016 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
PTCH1
NM_000264.5 5_prime_UTR
NM_000264.5 5_prime_UTR
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 3.30
Genes affected
PTCH1 (HGNC:9585): (patched 1) This gene encodes a member of the patched family of proteins and a component of the hedgehog signaling pathway. Hedgehog signaling is important in embryonic development and tumorigenesis. The encoded protein is the receptor for the secreted hedgehog ligands, which include sonic hedgehog, indian hedgehog and desert hedgehog. Following binding by one of the hedgehog ligands, the encoded protein is trafficked away from the primary cilium, relieving inhibition of the G-protein-coupled receptor smoothened, which results in activation of downstream signaling. Mutations of this gene have been associated with basal cell nevus syndrome and holoprosencephaly. [provided by RefSeq, Aug 2017]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -4 ACMG points.
BS2
High AC in GnomAd4 at 5 AD gene.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
PTCH1 | ENST00000331920.11 | c.-15_-4dupGGCGGCGGCGGC | 5_prime_UTR_variant | 1/24 | 5 | NM_000264.5 | ENSP00000332353.6 | |||
PTCH1 | ENST00000437951.6 | c.199-1777_199-1766dupGGCGGCGGCGGC | intron_variant | 5 | NM_001083603.3 | ENSP00000389744.2 |
Frequencies
GnomAD3 genomes AF: 0.0000338 AC: 5AN: 147736Hom.: 0 Cov.: 22
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GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000157 AC: 16AN: 1015962Hom.: 0 Cov.: 30 AF XY: 0.0000166 AC XY: 8AN XY: 480702
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GnomAD4 genome AF: 0.0000338 AC: 5AN: 147736Hom.: 0 Cov.: 22 AF XY: 0.0000556 AC XY: 4AN XY: 71922
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1Benign:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Sep 18, 2024 | The c.-15_-4dup12 variant is located in the 5 prime untranslated region (5'UTR) of the PTCH1 gene. This variant results from a duplication of 12 nucleotides at nucleotide positions -15 to -4 upstream from the first translated codon. This nucleotide region is well conserved in available vertebrate species. Based on the available evidence, the clinical significance of this variant remains unclear. - |
PTCH1-related disorder Benign:1
Likely benign, no assertion criteria provided | clinical testing | PreventionGenetics, part of Exact Sciences | Nov 19, 2019 | This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). - |
Computational scores
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Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at